D because they lived near the rivers, they both used the water to their advantage, they used it for farms & to make mud bricks, but then again it could be C
Both civilizations had their houses built with materials they found nearby. They lived in a variety of structures that included houses made of rocky material near the almond trees.
The answer is B because they had a highly advanced numeral system with place values. Maya mathematics were also far ahead of Europe for many centuries.
